Performance Improvement of Stereo Acoustic Echo Canceler Using Gram-Schmidt Orthogonality Principle

그람-슈미트 (Gram-Schmidt) 직교원리를 이용한 스테레오 음향 반향 제거기의 성능향상

  • 김현태 (부산·울산지방 중소기업청) ;
  • 박장식 (동의공업대학 영상정보처리과) ;
  • 손경식 (부산대학교 전자공학과)
  • Published : 2001.07.01

Abstract

In stereo acoustic echo canceller scheme, coefficients of adaptive filter converge very slowly or misconverge to real acoustic echo path in receiving room. This is due to cross-correlation in stereo signals. In this paper, a new preprocess algorithm is proposed to improve the performance of stereo AEC(acoustic echo canceller) without computational burden. The proposed algorithm reduces cross-correlation using Gram-Schmidt orthogonality principles and nonlinear filtering. Computer simulations demonstrate that this algorithm performs well compared to conventional ones. When the acoustic path of transmitting room is changed, stereo AEC using proposed algorithm is well performed.

References

  1. 1991 IEEE Workshop on Applicaitons of Signal Processing to Audio and Acoustics Acoustic Echo Cancellation for Stereophonic Teleconferencing M.M. Sondhi;D. R. Morgan
  2. ICASSP DSP Implemetation and Performance Evaluation of A Compact Stereo Echo Canceller A. Hirano;A. Sugiyama;Y. Arasawa;Kawayachi
  3. IEEE Signal Processing Letters v.2 no.8 Stereo Acoustic Echo Cancellation-An Overview of the Fundamental Problem M. M. Sondhi;D. R. Morgan;J. L. Hall
  4. ICASSP Stereo Projection Echo Canceller with True Echo Path Estimation S. Shimauchi;S. Makino
  5. IEEE Signal Processing Letters v.3 no.2 A Multichannel Affine Projection algorithm with Applications to Multichannel Acoustic Echo Cancellation J. Benesty;P.Duhamel;Y. Grenier
  6. ICASSP A Better Understanding and An Improved Solution to the Problems of Stereophonic Acoustic Echo Cancellation J. Benesty;D. R. Morgan;M. M. Sondhi
  7. 한국음향학회지 v.18 no.5 스테레오 음향반향제거기를 위한 적응필터링 알고리즘 김은숙;정양원;박영철;윤대희
  8. ICASSP Adaptive Filtering Algorithms for Stereophoinic Acoustic Echo Cancellation J. Benesty;F. Amand;A. Gilloire;Y. Grenier
  9. Electron. Comm. Japan. v.J67-A no.2 An Adaptive Filtering Algorithm Using an Orthogonal Projection to An Affine Subspace and Its Properties K. Ozeki;T. Umeda